NO spark

b4favre · Jul 13, 2010

I have a 1948 farmall cub. I have no spark at all. I have replaced the plugs, wires ,points and condenser and cap. any advice!!

Dalex · Jul 13, 2010

If you have gapped the points correctly, about .020 , then maybe your coil has burned out . Mine did .

Janicholson · Jul 13, 2010

With the wire to the distributor removed from the distributor, see if there is voltage on the wire with the ignition on. If not, see if there is voltage on the other side of the coil. if not the ignition is not getting power (either from the switch, or through the amp meter to the switch, or to the amp meter from the starter switch.
If power is there, at the wire to the dist., put the coil wire about 1/8" away from the block and then brush the wire against bare metal (you are acting like points) it should spark the gap at the coil wire. if it does not, the coil is probably bad. If it does, the points are not working to make and break the circuit. Gap is .020" when they are open and the rubbing block is on the high point of the distributor cam. Jim

d. coleman · Jul 13, 2010

just had the same problem(see earler post)found dealer had sold me the wronge cap amd rotor combo. good luck, d.coleman

El Toro · Jul 13, 2010

Do you have a mag or distributor? If you have a distributor you need to check for battery voltage at your coil with the ignition switch on
and your points open. Should have battery voltage on both small terminals. If there's no voltage on either terminal you need to check your ignition switch for voltage. Trace the wire back from the coil to your ignition switch and see if there's voltage on that terminal. You still need the ignition on. Hal

NO spark

b4favre

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Dalex

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Janicholson

Well-known Member

d. coleman

Member

El Toro

Well-known Member

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